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authorEric W. Biederman <ebiederm@xmission.com>2018-01-22 14:58:57 -0600
committerEric W. Biederman <ebiederm@xmission.com>2018-01-22 19:07:08 -0600
commit5f74972ce69fdc6473f74253283408af75a3be15 (patch)
tree0353784ed4e95a7a32e159ba9b66d1f697317680 /arch/arc
parent66e0f26315ce7dd3f4efdbdee63f30dac643763f (diff)
downloadlinux-5f74972ce69fdc6473f74253283408af75a3be15.tar.bz2
signal: Don't use structure initializers for struct siginfo
The siginfo structure has all manners of holes with the result that a structure initializer is not guaranteed to initialize all of the bits. As we have to copy the structure to userspace don't even try to use a structure initializer. Instead use clear_siginfo followed by initializing selected fields. This gives a guarantee that uninitialized kernel memory is not copied to userspace. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'arch/arc')
-rw-r--r--arch/arc/kernel/traps.c14
1 files changed, 8 insertions, 6 deletions
diff --git a/arch/arc/kernel/traps.c b/arch/arc/kernel/traps.c
index bcd7c9fc5d0f..c7206789e9ce 100644
--- a/arch/arc/kernel/traps.c
+++ b/arch/arc/kernel/traps.c
@@ -65,12 +65,14 @@ unhandled_exception(const char *str, struct pt_regs *regs, siginfo_t *info)
#define DO_ERROR_INFO(signr, str, name, sicode) \
int name(unsigned long address, struct pt_regs *regs) \
{ \
- siginfo_t info = { \
- .si_signo = signr, \
- .si_errno = 0, \
- .si_code = sicode, \
- .si_addr = (void __user *)address, \
- }; \
+ siginfo_t info; \
+ \
+ clear_siginfo(&info); \
+ info.si_signo = signr; \
+ info.si_errno = 0; \
+ info.si_code = sicode; \
+ info.si_addr = (void __user *)address; \
+ \
return unhandled_exception(str, regs, &info);\
}